Brake and adjusting device for web-rolls of printing-presses.



1N0. 628,!48. Patented July 4, I899. J. m. RICE.

BRAKE AND ADJUSTING DEVICE FOR WEB ROLLS OF PRINTING PRESSES.

(Application filed Jan. 11,,1898,)

(No Model.) 4 2 sheets-sheet l.

lllllllll vlll l lfll llllllll I IIIIllH 5 we! a h I IIJUI 'I llllllllllllilllllillllllll! WITNESSES: INVENTOR w In Z M ATTORNEY No. e2a,|4ai Patented July 4, I899. .1. m. RICE.

NG DEVICE FOR WEB BULLS 0F PRINTING PRESSES.

(Application filed Jan. 11, 1898,)

BRAKE AND ADJUSTI 2 Shasta-Sheet 2 UNITED STATES PATENT OFFICE.

JOHN M. RICE, OF NEW YORK, N. Y., ASSIGNOR TO ROBERT HOE, THEODORE H. MEAD, AND CHARLES W. CARPENTER, OF SAME PLACE.

BRAKE AND ADJUSTING DEVICE FOR WEB-ROLLS OF PRlNTlNG-PRESSES.

SPECIFICATION forming part of Letters Patent No. 628,148, dated July 4, 1899.

Application filed January 11, 1898. Serial No. 666,341. (No model.)

To aZZ whom it may concern: The object of this invention is'to produce Be it known that I, JOHN M. RICE, a citizen a tension device for use on the web-rolls of of the United States, residing at New York, printing-machines and in other similar relacounty of New York, and State of New York, tions employing a drum or pulley and frie have invented certain new and useful Imtion pads or blocks in which the adjustments provements in Friction and Adjusting Denecessary to vary the amount of friction may vices for the Sheet-Feedin g Rolls of Printing be quickly and accurately made and the wear Presses, fully described and represented in and tear produced by the contacting parts the following specification and the accompamay be readily and easily compensated for.

IO nying drawings, forming a part of the same. A further object of the invention is to prop This invention relates to certain improveduce a friction mechanism of the character ments in friction devices and adjusting mechdescribed in which the necessary sidewise adanism for rolls, and is particularly intended justment to properly position the roll may be and adapted for use in connection with the quickly made and the roll accurately posi- I 5 rolls which supply the paper web to rotary tioned, so as to give the web the proper cenprinting-machines. tral lead to the machine.

It is desirable in rotary printing-machines A further object of the invention is to proand. other analogous machines to which maduce a friction mechanism of the character terial is fed from a roll in web form to prodescribed in which there shall be a certain 20 vide the web-roll with a tension mechanism degree of automatic adjustment, sothat slight which shall operate to control the feed of the inequalities in the roll may be compensated material to the machine. In such devices as for without requiring the constant attention heretofore constructed it has been usual to of the attendant. employ a brake pulley or drum mounted on With these and other objects in view the 25 the roll-shaft and to use in connection thereinvention consists in certain parts, improvewith arms or levers carrying brake shoes, ments, and combinations to be hereinafter dewhich arms or levers are pivoted on a comscribed, and specifically pointed out in the mon center. Devices were employed to bring claims hereunto appended. together or separate the ends of the levers, so In the accompanying drawings,which con- 0 as to increase or decrease the tension on the stitute a part of this specification, Figure 1 8o Web. Devices of this character havebeen obis a side View of a tension mechanism applied jectionable, however, because uneven wear to a web-roll of a printing-machine, certain on either the pulley or the brake-shoes, or parts being shown in section. Fig. 2 is a seeboth, threw the entire device out of adjusttional view taken on the line 2 2 of Fig. 3,

3 5 ment, and consequently seriously interfered and Fig. 3 is an end view of the device. with its operation. -Furthermore, in ma- In the embodiment of the invention which chines to which a web is fed it is desirable to has been selected for illustration, Aindicates provide means for shifting the webroll side the web-roll; B, the shaft on which it is wise in order to cause the web to be properly mounted D, a part of the frame of a print- 4 led into the machine. This is particularly ing-machine, and C the journal-bearing car- 0 I true of printing-machines on account of the ried by the frame in wh'ch the shaft is I necessity for so positioning the web-roll as to mounted. cause the imprint made by the type-cylinders On the shaft B is mounted a friction-head to fall properly on the web with respect to the consisting of a drum or pulley E. This pull 45 margins on the page. In the devices heretoley has a groove in its face, which groove has 5 fore used the means for effecting this sidethe form of a reentrant angle, so as to prowise adjustment have been more or less comduce a pulley or drum which may be desigplex, causing a considerable loss of time in nated as double-cone-shaped. positioning the web-roll whenever a new roll Engaging the double-cone-shaped pulley 5. was put into the machine. E are friction blocks or pads F, made of any suitable material, but preferably of wood. These blocks constitute brake-shoes, which are of V'shape, thus forming salient angles corresponding to the reentrant angle in the pulley-face. These blocks or shoes are preferably two in number and are located on opposite sides of the pulley, and they are pivoted to levers G. These levers are in turn pivoted on studs I, which are suitably mounted in the frame of the machine, thus giving the levers independent pivotal points. The studs I are or may be connected by acrossbrace J of the form shown.

One of the levers G is preferably provided with a pivoted bell-crank lever K, the movement of which is limited by a stop M and which has a bent leaf-spring L, secured thereto in the manner clearly shown in Fig. 3 of the drawings. The other lever is provided with a threaded socket G, in which works a screw-threaded rod T, having a hand-wheel T. The'end of the rod which is opposite to that engaging the threaded socket G bears against the spring L, which has been before described as mounted upon the bell-crank 1ever K, finding its bearing in a small hole or concavity (not shown) in the spring.

It is obvious that by turning the handwheel T in the proper direction the levers G will be separated at theirouterends and the brake-shoes F given a movement in a transverse direction with respect to the drum or pulley, so as to provide for any desired amount of friction on the said pulley or to compensate for the wear on either the block or the pulley. Furthermore, owing to the arran gement of the levers and blocks,the blocks will always adjust themselves to any unevenness in wear. In case the operator desires to quickly or momentarily increase the friction of the brake-shoes on the drum he can do so by operating the upwardly-extending arm of the bell-crank K. When the arm is released, the bell-crank will resume its normal position, with its inner arm bearing against the stop M, which is mounted on the lever G. The spring L, against which the screw-threaded rod bears at one end, will operate to compensate for any minor changes in tension, because of irregularities in the shape of the roll or for other reasons, and cause the roll to turn evenly and steadily under the pull imparted to it by the cylinders of the printing or other machine.

Various devices may be used for shifting the friction-drum and the roll laterally, so as to properly position the roll with relation to the machine to which the material composing the roll is to be fed. Preferably, however, this adjustment is effected by means of a screw-threaded short shaft 0, which is provided with a hand-wheel N and which engages a suitably-threaded aperture in the frame. The short shaft 0 is provided with two stationary collars P, between which is held a sleeve R, in which the shaft turns and to which is secured a cross-piece S. This cross-piece S has its ends provided with perforations, which surround the studs I before referred to. Through these perforations pass hubs H, which extend laterally from the levers G. The ends of the hubs extend through and beyond the cross-piece S and are provided with collars or nuts g, so that the crosspiece is held between these nuts 9 on one side and the levers G on the other. By turning the hand-wheel N the screw-threaded short shaft 0 may be given an end wise movement in either direction, and it will carry with it in this movement the cross-piece S and the levers G. The levers G, having their angular faces engaging the groove in the pulley or drum E, will in turn move it and the shaft and paper-roll to which it is connected.

It is of course obvious that the face of the pulley may be formed with a salient angle, the friction-block having the reentrant angle, and in general many changes may be made in the construction of this device without departing from the spirit and scope of the invention, and it is to be understood, therefore, that the invention is not to be limited to the precise details of construction herein set forth. Furthermore, while the device is particularly adapted to use in connection with the web-rolls of printing-machines, it is also capable of use in many other relations, and it is to be understood that its use is not limited to such machines.

What I claim isl. The combination of a paper-roll shaft, a friction-head thereon, pivoted brake-shoes adapted to engage therewith, the head and shoes being formed with generally corresponding rentrant and salient angles, and means for adjusting the shoes to and fro in the direction of the shaft to secure the marginal adjustment of the web, substantially as described.

2. The combination of a paper-roll shaft, a friction-head thereon, arms carrying pivoted brake-shoes adapted to engage with the friction-head, the head and shoes being formed with generally corresponding reentrant and salient angles, and said arms being pivoted to the frame, means for adjusting the relation to each other of the outer ends of the arms, and means for moving the arms to and fro with respect to the length of the shaft in order to adjust the margins of the web, substantially as described.

3. The combination of a paper-roll shaft, a friction-head thereon, arms pivoted at different points and carrying pivoted brake-shoes adapted to engage the friction-head, the head and shoes being formed with generally corresponding reentrant and salient angles, a cross-piece, connections between the crosspiece and the brake-shoe arms, and means for moving the cross-piece to and fro with reference to the paper-roll shaft for adjusting the margins of the web, substantially as described.

4. The combination of a paper-roll shaft B,

a double-cone-shaped friction-head thereon,

- pivoted levers G, pivots I therefor upon the 5. The combination with the roll and itsshaft, of a friction-head fixed on the shaft, a friction-block engaging the surface of the friction-head, the head and the block being formed with generally corresponding reentrant and salient angles, and means for adj usting said friction-block both parallel and transversely to the axis of the roll-shaft, substantially as described.

6. The combination with a roll-shaft, ofa friction-head thereon, a brake-shoe engaging the head, the head and shoe being formed with generally corresponding reentrant and salient angles, a lever to which the brakeshoe is pivoted, means for adj nsting the ,position of the lever so as to increase or decrease the pressure of the shoe on the head, and a spring interposed between thelever and the adjusting means, substantially as described.

7. The combination with a roll-shaft, of a friction-head thereon, a pair of brake-shoes engaging the head, the head and shoes being formed with generally corresponding reentrant and salient angles, a pair of levers to which the brake-shoes are pivoted, an adj usting device for controlling the pressure of the brake-shoes carried by one of the levers, and a spring carried bythe other lever against which the adjusting device bears, substantially as described.

8. The combination with a roll-shaft, of a friction-head thereon, a pair of brake-shoes pendent pivotal points. and carrying pivoted friction blocks or shoes engaging the head, said head and shoes being formed with generally corresponding reentrant and salient angles, means for operating the levers to cause the blocks to bear with greater or less pressure on the head and means for adjusting the blocks or shoes lengthwise of the roll-shaft, substantially as described.

Signed by me, at New York city, this 10th day of January, 1898.

JOHN M. RICE.

Witnesses:

CLARENCE L. BURGER, DE WITT O. REED. 

